“Economic Impact of Covid 19 on Travel and Tourism Agencies in the City of Chachapoyas, Peru”. Revista Científica Interdisciplinaria Investigación y Saberes 12, no. 1 (January 13, 2022). Accessed June 4, 2025. http://201.159.220.249/revista/index.php/investigacion_y_saberes/article/view/134.